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MANUAL A/C DIAGNOSIS TSB Revision HEATER, AIR CONDITIONING AND VENTILATION 55A-136 STEP 22. Check the A/C pressure sensor operation. valve. (2) Disconnect the A/C pressure sensor connector and connect special tool test harness MB991658 as shown in the (3) Turn ON the engine and then turn ON the air conditioner switch. (4) At this time, check to see that the voltage of A/C pressure sensor terminal No. 2 reflects the specifications of the ± 5%. Q: Is the A/C pressure sensor operating properly? YES : Go to Step 23. conditioning works normally. STEP 23. Check the refrigerant level. YES : Go to Step 24. Service ). Check that the air conditioning works normally. STEP 24. Replace the A/C-ECU. YES : No action is necessary and testing is complete. the air conditioning works normally. AC305034 A/C PRESSURE SENSOR AD AC307368 A/C MB991658 AB HARNESS SIDE AC208297AB REFRIGERANT PRESSURE (MPa) OUTPUT VOLTAGE (V) 0 1 2 3 5 4 1 2 3 |